Presto (browser engine)
|Developer(s)||Opera Software ASA|
2.12.423 / 16 March 2015
|Operating system||Linux (non-free repositories) and Windows|
|Type||Application framework, Browser engine|
Presto was the browser engine of the Opera web browser for a decade. It was released on 28 January 2003 in Opera 7, and later used to power the Opera Mini and Opera Mobile browsers. As of Opera 15, the desktop browser uses a Chromium backend, replacing Presto with the Blink engine.
A succession of ECMAScript engines have been used with Opera. (For the origin of their names, see Cultural notes below). Pre-Presto versions of Opera used the Linear A engine. Opera versions based on the Core fork of Presto, Opera 7.0 through 9.27, used the Linear B engine. The Futhark engine is used in some versions on the Core 2 fork of Presto, namely Opera 9.5 to Opera 10.10. When released it was the fastest engine around, but in 2008 a new generation of ECMAScript engines from Google (V8), Mozilla (TraceMonkey), and Apple (SquirrelFish) took one more step, introducing native code generation. This opened up for potential heavy computations on the client side and Futhark, though still fast and efficient, was unable to keep up.
In early 2009, Opera introduced the Carakan engine. It featured register-based bytecode, native code generation, automatic object classification, and overall performance improvements. Early access in the Opera 10.50 pre-alpha showed that it is as fast as the fastest competitors, being the winner in 2 out of the 3 most used benchmarks.
- Nokia 770 Browser (based on Opera)
- Sony Mylo COM-1's Browser (based on Opera)
- Macromedia Dreamweaver MX to Dreamweaver CS3 (CS4/CS5 use WebKit)
- Adobe Creative Suite 2
- Adobe Creative Suite 3
- Virtual Mechanics SiteSpinner Pro
Source code leak
On January 12, 2017, the source code was leaked to GitHub. Two days later it was taken down with a DMCA request. On January 18 Opera Software has confirmed the authenticity of the source code.
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- "На GitHub появился странный репозиторий, похожий на исходники движка Opera Presto [закрыто правообладателями]". GeekTimes (in Russian). Retrieved 2017-10-12.
- "2017-01-12-Presto.md". GitHub. Retrieved 2017-10-12.
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